Winding factors and magnetic fields in permanent magnet brushless machines with concentrated windings and modular stator cores

Greg Heins, D Ionel, Mark Thiele

    Research output: Chapter in Book/Report/Conference proceedingConference Paper published in ProceedingsResearchpeer-review

    Abstract

    Removing some sections of the stator yoke in a permanent magnet brushless machine can be beneficial for reducing punching waste and simplifying motor manufacture. However in some cases, restricting the possible flux paths in this way will have a detrimental impact on the torque and air-gap harmonics. This paper discusses the potential implications of modular stator core arrangements and presents the air-gap flux density harmonics and winding factors for potential slot/pole combinations. FEA simulations are presented to support the analytical calculations. The analysis suggests that the performance reduction from using a modular stator is minimal when the number of slots and poles are similar but drops off substantially when this is not the case. A modular core stator will increase the MMF sub-harmonics due to the magnet field but can reduce the sub-harmonics due to the armature if a single layer winding is used. The effect of slotting is very similar for a modular and conventional core machine and FEA results match previously published analytical analyses.
    Original languageEnglish
    Title of host publicationProceedings of Energy Conversion Congress and Exposition (ECCE), 2013 IEEE
    PublisherIEEE, Institute of Electrical and Electronics Engineers
    Pages5048-5055
    Number of pages8
    ISBN (Print)978-147990335-1
    DOIs
    Publication statusPublished - 2013
    EventIEEE Energy Conversion Congress and Exposition (ECCE 2013) - Denver, Colarado, Denver, United States
    Duration: 15 Sep 201319 Sep 2013
    Conference number: 2013

    Conference

    ConferenceIEEE Energy Conversion Congress and Exposition (ECCE 2013)
    Abbreviated titleECCE
    CountryUnited States
    CityDenver
    Period15/09/1319/09/13

    Fingerprint

    Stators
    Permanent magnets
    Magnetic fields
    Poles
    Slotting
    Fluxes
    Finite element method
    Punching
    Air
    Magnets
    Torque

    Cite this

    Heins, G., Ionel, D., & Thiele, M. (2013). Winding factors and magnetic fields in permanent magnet brushless machines with concentrated windings and modular stator cores. In Proceedings of Energy Conversion Congress and Exposition (ECCE), 2013 IEEE (pp. 5048-5055). IEEE, Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/ECCE.2013.6647382
    Heins, Greg ; Ionel, D ; Thiele, Mark. / Winding factors and magnetic fields in permanent magnet brushless machines with concentrated windings and modular stator cores. Proceedings of Energy Conversion Congress and Exposition (ECCE), 2013 IEEE. IEEE, Institute of Electrical and Electronics Engineers, 2013. pp. 5048-5055
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    title = "Winding factors and magnetic fields in permanent magnet brushless machines with concentrated windings and modular stator cores",
    abstract = "Removing some sections of the stator yoke in a permanent magnet brushless machine can be beneficial for reducing punching waste and simplifying motor manufacture. However in some cases, restricting the possible flux paths in this way will have a detrimental impact on the torque and air-gap harmonics. This paper discusses the potential implications of modular stator core arrangements and presents the air-gap flux density harmonics and winding factors for potential slot/pole combinations. FEA simulations are presented to support the analytical calculations. The analysis suggests that the performance reduction from using a modular stator is minimal when the number of slots and poles are similar but drops off substantially when this is not the case. A modular core stator will increase the MMF sub-harmonics due to the magnet field but can reduce the sub-harmonics due to the armature if a single layer winding is used. The effect of slotting is very similar for a modular and conventional core machine and FEA results match previously published analytical analyses.",
    keywords = "Air-gap flux densities, Analytical analysis, Analytical calculation, Concentrated winding, FEA simulation, Modular stators, Permanent-magnet brushless machines, Winding factors, Energy conversion, Harmonic analysis, Permanent magnets, Stators, Winding",
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    language = "English",
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    Heins, G, Ionel, D & Thiele, M 2013, Winding factors and magnetic fields in permanent magnet brushless machines with concentrated windings and modular stator cores. in Proceedings of Energy Conversion Congress and Exposition (ECCE), 2013 IEEE. IEEE, Institute of Electrical and Electronics Engineers, pp. 5048-5055, IEEE Energy Conversion Congress and Exposition (ECCE 2013), Denver, United States, 15/09/13. https://doi.org/10.1109/ECCE.2013.6647382

    Winding factors and magnetic fields in permanent magnet brushless machines with concentrated windings and modular stator cores. / Heins, Greg; Ionel, D; Thiele, Mark.

    Proceedings of Energy Conversion Congress and Exposition (ECCE), 2013 IEEE. IEEE, Institute of Electrical and Electronics Engineers, 2013. p. 5048-5055.

    Research output: Chapter in Book/Report/Conference proceedingConference Paper published in ProceedingsResearchpeer-review

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    AU - Ionel, D

    AU - Thiele, Mark

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    N2 - Removing some sections of the stator yoke in a permanent magnet brushless machine can be beneficial for reducing punching waste and simplifying motor manufacture. However in some cases, restricting the possible flux paths in this way will have a detrimental impact on the torque and air-gap harmonics. This paper discusses the potential implications of modular stator core arrangements and presents the air-gap flux density harmonics and winding factors for potential slot/pole combinations. FEA simulations are presented to support the analytical calculations. The analysis suggests that the performance reduction from using a modular stator is minimal when the number of slots and poles are similar but drops off substantially when this is not the case. A modular core stator will increase the MMF sub-harmonics due to the magnet field but can reduce the sub-harmonics due to the armature if a single layer winding is used. The effect of slotting is very similar for a modular and conventional core machine and FEA results match previously published analytical analyses.

    AB - Removing some sections of the stator yoke in a permanent magnet brushless machine can be beneficial for reducing punching waste and simplifying motor manufacture. However in some cases, restricting the possible flux paths in this way will have a detrimental impact on the torque and air-gap harmonics. This paper discusses the potential implications of modular stator core arrangements and presents the air-gap flux density harmonics and winding factors for potential slot/pole combinations. FEA simulations are presented to support the analytical calculations. The analysis suggests that the performance reduction from using a modular stator is minimal when the number of slots and poles are similar but drops off substantially when this is not the case. A modular core stator will increase the MMF sub-harmonics due to the magnet field but can reduce the sub-harmonics due to the armature if a single layer winding is used. The effect of slotting is very similar for a modular and conventional core machine and FEA results match previously published analytical analyses.

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    KW - Permanent-magnet brushless machines

    KW - Winding factors

    KW - Energy conversion

    KW - Harmonic analysis

    KW - Permanent magnets

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    Heins G, Ionel D, Thiele M. Winding factors and magnetic fields in permanent magnet brushless machines with concentrated windings and modular stator cores. In Proceedings of Energy Conversion Congress and Exposition (ECCE), 2013 IEEE. IEEE, Institute of Electrical and Electronics Engineers. 2013. p. 5048-5055 https://doi.org/10.1109/ECCE.2013.6647382